These were made as the K32 or M32; 350cc or 500cc respectively. Only difference was the bore size. New for 1932, it was the successor to the D28 and D29 model after a three year hiatus. Sort of a ohv top end built onto a 350EW crankcase; well not exactly but that was the general idea behind them. Since Douglas was nearly bankrupt for 1933, the K/M32 were a one year model.
-Doug